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(No Model.) 2 sheets Sheet 2.

T. J. L. SMILEY 82; G. H. STOMBS. AUTOMATIC GUT-OFF FOR GAS BURNERS.

No. 340,381. Patented Apr. 20, 1886.

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llmrra STATES PATENT Fries.

THOMAS J. L. SMILEY AND CHARLES H. STOMBS, OF SAN FRANCISCO, CAL.

AUTOMATIC CUT-OFF FOR GAS-BURNERS.

SPECIFICATION forming part of Letters Patent No. 340,381, dated April 20 1886.

Application filed August 13, 1885. Serial No. 174,282. (No model.)

To all whom it may concern.-

Be it known that we, THOMAS J. L. SMILEY and CHARLES H. STOMBs, both of San Francisco, in the county of San Francisco and State of California, have invented certain new and useful Improvements in Automatic Cut-OHS forGasBni-ners, of which the following is a full, clear, and exact description.

This invention relates to gas-burners which, by means of an expanding and contracting attachment, operate a valve to shut oil the gas after the flame is extinguished, but unlike these devices as ordinarily constructed our invention provides for shutting off the gas when the burner is cold, and for keeping it shut ofi', so thatif thegas is turned on without lighting it cannot flow or escape through the burner, nor until a light is applied to the expanding and contracting attachment, which operates, when expanded, to open the valve to the burner tip or tips, but when contracted admits of the valve closing independently of the attachment, and of keeping closed.

The invention, which includes agravitating valve and thermostatic fingers or springs, substantially as hereinafter described, is applicable both to double and single tip burners, and constitutes alife-saving gas-burnnwhich will do away with all possibility of accident or death from asphyxia by escape of the gas.

Reference is to be had to the accompanying drawings, forming part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 represents a side elevation of a twin or double tip burner embodying our invention; Fig. 2, a vertical section of the same on the line to m, Fig. 1; Fig. 3, a plan thereof. Fig. 4 is a sectional elevation showing the invention as applied to a single-tip burner; Figs. 5, 6, and 7, an exterior elevation, sectional elevation, and a plan view showing a modification of the invention as applied to a single-tip burner.

Referring in the first instance to Figs. 1, 2, and 3 of the drawings, A A indicate the body of the burner, the lower part, A, which screws from below into the upper part, forming the screw-connection wit-h the pipe that supplies the gas to the burner. 13 B are twin or duplicate burner-tips, arranged to fit sockets b in the upper part, A, on opposite sides of the vertical center line of the burner. These tips are set to incline toward each other at their upper ends, but the inclination is onlya very slight one, so that the gas will escape from them in directions almost parallel with the vertical center line of the burner, and when the gas is lighted their flames are kept for a considerable distance apart and prevented from quickly meeting by the interposition of the thermostatic fingers or springs C C and the head or not 0 on top of the stem 62 of the automatic valve D of the burner attachment. This insures the generation of a greater current of air to the flames and a more perfect combustion of the gasor, in other words, a larger flame with the same supply, and con sequently a greater light for a given amount of gas. The valve-stem d also aids in keeping the flames apart, as above described, and the distancewhich the burner-tips are from one another adds to the desired effect.

The valve-stem (Z projects up through a central aperture, 6, in the upper part, A, of the burner-body and extends above the level of the tops of the tips B B. At or near its lower end it is provided with a reverse or double valve, D, the upper face of which, when the valve is raised or open, rests in a seat, f, on the under side of the body part A, and allows of gas to pass by lateral apertures g to the burner-tips,and also excludes gas from escaping up the aperture 0. \Vhen said valve, however, is lowered or closed, then its under face bears down against a seat, f, in the top of the supply part A of the burner, and exeludes all escape of gas to the burner-tips or otherwise through the burner. This valve may be weighted below, as shown, or is otherwise made to close by gravity, and so that the pressure of the gas will not lift it.

The thermostatic fingers or springs C C are attached at their lower ends to the body of the burner, and are bent inward at their upper ends to project beneath the head or nut c of the valve-stem d, and so that when the valve D is down said head or not will rest or nearly come in contact with the upper inner ends of the thermostatic fingers or springs, which are then cold, the flame being extinguished. The head or not 0 screws on the valve-stem, to make it adjustable relatively to the thermostatic fingers or springs.

Upon a lighted match being applied to the tops of the thermostatic fingers or springs C 0, they, being made of suitable metal or material, will expand and lift the valve D, opening the orifice beneath for supply of gas to the burner-tips and closing the valve-stem aperture 6, so that the gas cannot escape through other than the regular apertures to the tips, where it will beignited. Upon blowing out the light or shutting off the gas at the key. the thermostatic fingers will cool and contract,and the valveD and its stem drop by gravity, closing the lower supply-orifice in the burner, and causing the flow of gas wholly to cease and to keep shut off when everything is cold, even though the key used for turning on and off the gas be open.

In Fig. 4 of the drawings substantially the same arrangement is shown applied to aburner having but a single and upright tip, B, and the action in every respect is similar, excepting that in this case the thermostatic attachments have no dividing effect upon the flame.

Figs. 5, 6, and 7 also show a single-tip burner with the invention applied, but in which duplicate thermostatic fingers or springsC C, an ranged on each side of the burner, are used, together with duplicate valve-stems d (1, con trolled by adjusting heads or nuts 00, and duplicate double or reverse faced valves D D, attached to the lower ends of said stems, for

opening or shutting off the supply of gas to or I from a central passage, 9, leading to the burner-tip, the operation being the same as in the other modifications.

Having thus described our invention, what i to the burner and projecting under the head v of said stem, substantially as herein shown and described.

3. The combination, with the burner pro vided with one or more passages, g, and the seats ff, of the double-faced valve D, provided with the stem d, projecting through the burner, and the thermostatic fingers G, engaging the valve-stem, substantially as herein shown and described.

4. In combination with the burner-body, its independent reverse or double faced valve D, and valve-scatsff, the valve-stem d, provided with an adjustable head or nut, c, and the thermostatic fingers or springs C, essentially as specified.

THOMAS J. L. SMILEY. CHARLES H. STOMBS.

Witnesses:

LEE D. CRAIG, .T. W. NYE. 

